Monarch Red Box .45ACP = Kaboom!??

This is a discussion on Monarch Red Box .45ACP = Kaboom!?? within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; I got a surprise at my local range today. I went in all set to teach some new shooters the basics with a couple boxes ...

Monarch Red Box .45ACP = Kaboom!??

I got a surprise at my local range today. I went in all set to teach some new shooters the basics with a couple boxes of Monarch .45 in the new Red Boxes. Unfortunately, the range flunky on duty told me all Monarch ammo had been banned from their range because it had caused several kabooms! So, I had to buy 2 boxes of Blazers from them ($21/box for Al-cased Blazer ).

I've always had good success with Monarch's rifle ammo. Sure, it's not the most accurate, and it's kinda dirty, but I've never had a malfunction with it, much less a kaboom. Has anyone heard of this? Should I be hesitant to shoot all this .45 I now have at a different range?

Oh, and the new shooters had a blast. One of them fell in love with my 1911, and the other went from never having shot a gun in her life to being a darn good shot with my P22.

"A well-educated electorate, being necessary to the continuance of a free state, the right of the people to keep and read books shall not be infringed."
Is this hard to understand? Then why does it get unintelligible to some people when 5 little words are changed?